1. when somebody takes too long to tell a joke
2. when somebody leaves out a pivotal part of the joke, therefore makes no sense
3. when somebody tries to crack a joke, but fails to give a smooth delivery
joke teller: "(insert beginning of joke here)... and then, and then, shoot, lemme think about this for a second...."
friend: (shakes head in disappointment) "joke dead"
friend 1: "ew, stephanie pratt is such a s u next tuesday."
friend2 : "don't you mean C u next tuesday?"
friend 3: "yup, joke dead."
joke teller: "why did the chicken cross the ro... ro... (SNEEZE)"
joke receiver: "ew, joke dead."